Finally I upgraded my App from PCL -> NETSTANDARD 2.0.
All went fine, app runs fine, it uses string resources fine.
Now I added a new string resource to AppResources.resx (with the VS built in grid resource editor), but the AppResources.Designer.cs is not re-generated, so I could not use the new string in my code:
error CS0117: 'AppResources' does not contain a definition for 'IDS_NEWSTRING'
Tried re-build, etc.
How to "ask" VS2017 (win)/Xamarin NETSTANDARD 2.0 to re-generate those AppResources.$LANG$.Designer.cs files?